html{
    line-height: 1;
}

p{
    border: 1px solid red;
}
span{
    border: 1px solid blue;
}

img{
    border: 1px solid green;
    width: 64px;
    height: 64px;
    vertical-align: top;
    /* vertical-align: middle; */
    /* 变成块级元素 */
    display: block;
}

div{
    border: 1px solid red;
}
ul{
    border: 1px solid por
}